Remote Senior Frontend Engineer, Marketing Website

Synthesia Limited; United States; Hybrid; USD 112,000 - 159,000; Full time

Job summary

Synthesia Limited is hiring a Senior Frontend Engineer for the Website team to own and evolve the component library and content model that power synthesia.io. You will contribute high-quality component and schema code, shaping the rendering stack used across our marketing site.

You will work on a fast-paced SaaS marketing site with a focus on performance, accessibility (WCAG 2.2 AA), and data-driven delivery, including AI-assisted development and analytics tagging.

Qualifications

• 5+ years as a software engineer, including 3+ years at senior level.
• Ownership of a content model in Sanity.
• Strong HTML, CSS and TypeScript with design-system experience.

Responsibilities

• Own the content model and Sanity schemas.
• Develop and evolve marketing pages using the component library.
• Ensure accessibility, performance and SEO quality across the site.

Skills

HTML

CSS

TypeScript

Front-end dev

Component API

Tools

Sanity

Tailwind CSS

AWS Lambda

SQL

Job description

agents, can build pages with, without breaking design, performance or SEO. Build, scale and evolve our section library: the Astro components, Sanity schemas and design tokens that let us compose marketing pages consistently and accessibly. Own the content model. Extend the platform for AI-assisted development, so coding agents can generate on-brand, on-spec sections from a design spec as reliably as a person can. Own SEO integrity as a first-class engineering concern: canonicals, sitemaps, structured data, redirects, and no traffic cliffs on launch. Raise the bar on engineering standards across the website surface: thorough code review, patterns others can follow, and tests around the parts that actually break. Shape the technical direction of the website platform over the next 6 to 12 months, and champion its adoption with the people who publish on it. At least five (5) years as a software engineer, including three (3) at senior level, building front end for content-driven or marketing platforms, Real ownership of a content model in Sanity. Deep front-end expertise: expert HTML, CSS and TypeScript, with a strong command of component API design and the developer experience of a shared library. Comfortable owning the server side as well as the front end: SSR, serverless and edge runtimes, API routes, a SQL database, secrets and CI. Solid understanding of responsive design, cross-browser compatibility and web performance, and comfortable building to WCAG 2.2 AA. You care that marketing sites are measured, on performance, SEO, analytics events and conversion, and you're happy being accountable to those numbers. Prior experience working on a large SaaS marketing website, at real traffic and with real stakes attached. Experience with AWS Lambda. Tailwind CSS v4, and experience working from a token-based design system. Experience, or strong interest, in making component libraries and content models consumable by AI agents. Analytics and tag
management implementation: dataLayer events, server-side tagging, getting attribution right without hurting performance. At Synthesia we're passionate about building, not talking, planning or politicising. 45 min call with the Head of Website about your past projects Our preference is for this role to be based either in-office or remote in London, UK. We can also accommodate remote workers elsewhere in Europe subject to compliance and right to work checks. This is full-time employment only, usually through OysterHR. No contractors possible.

Synthesia is the world s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US. As AI continues to shape the way we live and work, Synthesia develops products to enhance visual communication and enterprise skill development, helping people work better and stay at the center of successful organizations. As a Senior Frontend Engineer on our Website team, you'll be a co-owner of the platform behind synthesia.io : the component library, content model and rendering stack that every page on our marketing site is built from. This is a hands-on engineering role, and your primary output is high-quality component and schema code, plus the tooling that lets others build with it. The decisions you make are seen at scale, and we set the quality bar accordingly. The defining challenge of this role is composability: a marketing site that marketers, and increasingly AI